【摘要】 对火焰原子发射光谱法测定碳化钛中微量钠的条件进行了试验。样品用硝酸-氢氟酸溶解,在0.30mol/L硝酸介质中,以硝酸钾作消电离剂消除钠的电离干扰,饱和硼酸溶液络合试液中过量的氟离子。方法检出限为0.015μg/mL,样品加标回收率为97.6%~105.6%,方法的精密度(RSD,n=6)小于2.5%。更多还原

【Abstract】 A method for the determination of microamount of sodium in titanium carbide samples by flame atomic emission spectrometry is reported in this paper.The samples are dissolved with mixed acid of HNO3+HF.In the medium of 0.30 mol/L nitric acid,potassium nitrate is added to eliminate the ionization interference from Na and boric acid is used to complex excessive fluorine ions.The detection limit of the method for sodium is 0.015 μg/mL and the recovery is 97.6%～105.6% with precision of less than 2.5%RSD(n=6).更多还原